What resampling are you referring to?
The cropping and resizing, chiefly, though its image stabilising may also prove useful.
The thing is, I don't know AviSynth/VirtualDub all that well (G-Force's GOUT corrector has been my first real experience with that) and for all I know, its resampling math is as good as anyone else's, but AE's always been highly regarded for this sort of thing.
Maybe something to try after the official version gets done - you seem to have everything nicely in hand so far!